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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505ddd99318b0b181c7678eb05f0b3414462a11a14b065362ac6f3dab746308a' 
  AND token = 'IOPmswmppWpfXPD8Vqoh05kOOrIzQqCqR73k31G4CPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}