Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79ec3c69f72f8273a611ddc7e1e6ffae2099f0127cfe0f54ed3bb96f30e56c70' 
  AND token = 'aW1rC9xN2LqakAhgU/qzVV56SeiAGcyPrqCr1544uk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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