Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8aaf2d0d627458d1af2037323b1f5011b6b94226fe319eb6575bd844173202a' 
  AND token = '3a/SJQGgBeZFKf6HdN3d5aaqiDRCZB09l0PVQhtq9cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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