Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b17bb9089d9a4348c8c3ff60b59fdfdb2e418fd5859e2716b382535a24a93b0' 
  AND token = 'iD8ILpBTCj5BVNvEBJmrPtY3ltAnRnNcQoDun8bIBuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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