Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '030a7d7ec2c937017aa37fe2d70c6d236ff5cd21c692531e187aadd39f950f29' 
  AND token = 'QECZGnkUKA3xGwWoexPVove9I0Ieg3QqOJayRLuCRnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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