SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3771dd6f7f47d90abb9e84153bbf6752d057766e36e1d884a24f796257d1329b' 
  AND token = 'dAwB0vkd8SNyNBH/ERJHx12DeEgufFHJnhjzBsOXpSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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