Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d1312b84e0db1ee478ae6e6394cecb5928a990f040a903e3b950a942d926da1' 
  AND token = 'RJ5QR0cfGCQ+osWC9Ex8E6A4OAE2Rd0oJw7/XkB3e54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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