Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606f25078786bccf8aa99808dcf3954f8b1cf2a46aa8b9a148bee6700fed39fb' 
  AND token = '034Yklwhcu8xfhEfKMgDS0CSXly8coNuJOI6InnsuNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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