Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '761a7482f3ce32ab5db065fd071c54dcdb18712366deec2cf240bb8ff006f32d' 
  AND token = 'aXkMMxrZO/BeCbgJFcJUGBy2EfPeYL1K8Y4Dem4ZSYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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