Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdc44f930f864e12131ac51416e22c49a0209e0eedfc53f97a30c9c7c89d0740' 
  AND token = 'cn5RM69gfg2E2v45zMuqJky/5tjVlLPboort7uvmX6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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