Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d5b5b5d63f6fcc42515f4d794b1020f43352f0ca0c8273a4303f32fe80e6b10' 
  AND token = '7voePv6vbO4BO7vYFF5/A5zjJ+z5TTAupIPv+6E+0+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}