Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '704ef0f025bdb70e0b00f3630b43448b882ff7ce8c6f2ff57615abb9e0bc2987' 
  AND token = 'qP/K4r5V+3t8gytDqztEubrERq+RgMWBfBH5W9APt0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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