Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30c80a648440abb270833e4bc1602e660bbbffed7c7275abbf514a30c83a4c3d' 
  AND token = 'rSEmdttGLWXK/WoteUjqEIjotxmmOuts6w8oTT/xtlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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