Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a441c0a78438de4ff6bd7e6239b45da3a20dcd3aa3e62c26b1d59caa72d75f19' 
  AND token = 'UnfYt1DsqDUvcHEG7zkOfz9ESzh2jMpsuEODhx4Q74A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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