Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b0ab7a052143b022ddbd38ac14e5cf6c0f8c36c5c0f576f33ade16f5fe81202' 
  AND token = 'afDYCCfnyE+YjGb1NI+eoDPwoyVggmeTRkO+J1jvP3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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