Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e43ce24630c600beaf7fffc203d015407fe9a36dcdca92e1f8125d6106e50d8' 
  AND token = '2kTyt3bM3vL4EAIi/5Lv0gMfn2ZJXEXeo+1XwSlBDS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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