SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4498c0c70027dd326496536f916eb3eacf2082b1e96b33ab304d45efbe565954' 
  AND token = 'zCIM8a7vgUHRoORBQuA4Z4QubhlnY7SjbCjjgevOwag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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