Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '23710a79f9cfefebf43f2fae55b9af951c64a8be4ddc2252a0c9b999fb51daa2' 
  AND token = 'rCzNyaXyKi7cJbpA0LJPLEsm/x04Al9Mu5V/dSv/zcY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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