Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50c2339c9d536bf00fdc32e81fe81602230fa45bba051e73eaffcb7e1edcbb77' 
  AND token = 'wdfOGP+lbNy3Awd9D0ScyRsTCirKg4QUZDjUam2p/dY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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