Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a1f9eea3187b1a86a9477caf4c1f9ce07dd25851da822887e562271d9ee0ba6' 
  AND token = 'yZutEMcN0nk+8kOmfqyuRfj3XwDtFeQDCI6lOuSY7a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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