Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3dc8f4147276ee0990f815844f6e564f9e0bb1ebdda8670044fffa7379dcf82' 
  AND token = 'zt2u+R4Rvwust4Pm+3zNBxz36LymYB35Spd1mJ7x4gM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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