Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07430ea894341f50ae026ba80abd20e80f6ea18d5ce4dbd9b254fb0a90c482fa' 
  AND token = '+epGAZd0yf44TsxjRorchJTigNh7pIwDMsYsRXytYr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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