Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88b4d6ee8ce2a367f3f6bfb4e6ba73f537e7028a76765968ed0e643b42d01864' 
  AND token = 'kgnGGBBts/D9NtO0r+xxaA3lC1o0im9pTvYqSDaN7Jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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