Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b01c08aaa4187d4e84dc87ae8cb38396cf64ecc219f16104058fb11a1e32384c' 
  AND token = 'QiH/3g7xpgSfspVAhpQfqMBEPidKk2vfgfmPEkStRLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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