Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2993669deea7c80c63b538e410136363b01bc4f7f70734187812f6b50b699be' 
  AND token = 'TNHqtw0srHLnKkD9LO2cDPYaQ+Hec9uOxwAMbSa48RA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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