Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e5cf40323b8a482f8693d01db3aec6b7d726850e14019facafd3d515fd1b889' 
  AND token = 'Ywe3Hh+G+nEpn0qEg7W8s1vxCH7ZdMqHHfacrn+kqW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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