Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09dab1edb0896e041e50beef4039932ecffbc9ed0c351f3d4d7976ee721b7d30' 
  AND token = 'pGwIQkcuZ0vEU7dnjxSo8lIteO11vzcCIt2fpGKt6Ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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