SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a42559fba172190658c8995d9e3b11549168e7a85b826640062f967b7c6fd0ed' 
  AND token = 'IDyMDSlljZV6ioizq+cM7UkuBUpq1YLD8ZEy9Z+ezVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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