Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1098d763881847dcce377f49cde387ff3d40a1869d6a5a4e5b0c78cd33af29d' 
  AND token = 'trZ9za3zBWMi1DAAOxaZi0S1ir0ywBgD7tkDPeDP5aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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