Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c2543176b99414b3395bb013447670500b672927475d2482acf824f7101ee3e' 
  AND token = 'yKWYsds2YwZX7utvt3ymkFF63EDhSZydy9zVJOd34Xw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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