Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79325cf35e902f55a5f93ae08004d9915061a86c2693904be12693a45f001b7a' 
  AND token = 'AgFOBP5Bp4nvxHpzyPjsGs6TE32oHhwXyhy+uOiQshI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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