Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15621f7bd15fb28f31044b2d34261c5ba30dea087c33db1509efb8883eeeede7' 
  AND token = 'ybaMag4ZayKBAcggkgoPuVx8OIwezS8mtCUvmQw4ljs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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