Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ee25b6b4704379f902755a9dfa59c16591c686a351e6fb1ee9d013ce215a54' 
  AND token = 'MQHNBBaeHBI/nxaU9zFJT9so22yFwGXLb5UxUFTEu1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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