Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ee244023dacf19b59d214a4526566a26b74715f0c46a12d240c3539bdc1ca7c' 
  AND token = 'QR7C7sFaS2CjMfBOp3+thokJD9JjNYp0yMJZtUOm2TM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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