Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3e9f0cba2c9ac296187445838199814ffc6b91f2879c6b821a6f83aa99c07b67' 
  AND token = 'W6+vaMjr9Sjq4VNlqiosqfLNxyxjlRGrulBtUKvlfuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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