Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e299ac7c23857a8817e5412fa5ac947b1607fc787d0b174ec4df59ec6cc8a805' 
  AND token = '/euUB0YGAUTkRjELcNCajI0nxYVLCvW3/2zFIYJ8ODY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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