Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '197bd112251263c83b3c77b080b58bb714750ad9a67c775055be94f8b6a96b44' 
  AND token = 'fnr1O1qfop2qaa+CdO1pVDe2yT2x8zsCFG+4bXvUoyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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