Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f669bbc7122f83df9151c301be9454e30075344f11b210bb07f5bafe0c1ef2' 
  AND token = 'T7ZBzy752siAPDobg9EEuDfwKO+sQrmmt0FgVo1j9BI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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