Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8fe5c1f4bd17e54883ce10feef5770d5db3fa7c720d31e62834dc33360900e7' 
  AND token = '1Dk2767K00fDls1T5GOqB20eyFQsAaGMRXUs0hpRmnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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