Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86852f7563e51496714678605fcdb1caf1460a643a125cfed957b60a450a3ffe' 
  AND token = 'VjS5zGTcCAmCntBl2TtF9UyiYlfHKQR3pmLyHYTVCxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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