Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '75cf4f8b8ca8788288869f13d65d72f9372af459441b84c89c6ec58824d8b50f' 
  AND token = 'vkV4MrOlobtry5rCL+3+A1iNoIGyv6uDgEE3mub+NZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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