Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8891f54abea595193eb0d9a4d4924c6458c8bacee0a76ad20bbc75a4f3829e98' 
  AND token = 'XC6oLS7eq1MLPsYRqZoaSiizYXsFuCNaAEr8pG/fHJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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