Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '760e1c582e43260d677d9ae71f8303591595ff54edf2fe60a6c95c9ccffc824e' 
  AND token = 'xN9eBJLb5iOuPFfDh4suuotb7WblYZsuz+iLC8ubL54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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