Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ea15b4a53417babc2cdd2d9ee9d271d06bb9441f0deb658257a0163e19c2c7d' 
  AND token = 'akIe+/ttZ+H/3aY1jDZ8W4ZvXpLnQApMoPMLP0yLpek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}