SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c14620c13da63b4998b993674511f092fab7817dac8dd47015d4f04ff7388164' 
  AND token = 'yQjyGZwv7O7VPrlgDMlVB8Nx95JgH85L7E10q/jhs8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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