Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7a611be474e58e9de9e5cd513c88cb38ea65f170d21d647757ba13f0fca5b41' 
  AND token = 'rCqaGqV4AfLTyHzTpGg4WU6a9mad6RJTvnBoYyda/a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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