Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f17971310afb4b8de2cc040dc14dd1279a49d182122ee961502c98124a626d75' 
  AND token = '+EdD+8qas5udNRPLu4ZiRxnk+PsMj+Z6EwT+BF8ULcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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