Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96e6dc6aaa2a00c8a963ba54dd191b37b5e3896b9c22ce3842f0dd78ae5d0cec' 
  AND token = 'OVIpJG4aiG2qRnrqVVEIaZfkeowGqVJ6h9IkHTQVl8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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