Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd72deb9bc1588c1ec7a907c9b0b50b73a9b650a1b3f0051eca50e37771e50bb' 
  AND token = 'R94WtnpA0WuhCOnBtOWxXNy1930I1w4+cbAnXxUN5RE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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