Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8e8005c8d4d9e89048c8605a51176706954b01b1384189ffaab002a96ede7b4' 
  AND token = 'ooDh2XrdWD18S4j0wHLSgrt4/yZZ1TxAgdNaQV3lT/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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