Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '169732ca4e0936eaf1118db71e9fb1108d51d4fcf011acce6ffdc54c2fbfd295' 
  AND token = 'sfM0bitLSYe+Mogo61UkHnVMOZhVqJSvAzOERxdlBfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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