Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '657f8700c8decafa091f28bbbfeff696b2958c62d049f07871bb590c201a1950' 
  AND token = '2v7aIEDGoAzfk7WflTmP0PRP88Pd4NcYhMgBj3G9TsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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