Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e2da56174704e3d01b43553e0f4eb9286e291bb8b33d64c35ac90b8b6ef6d13' 
  AND token = 'JVZvqL+V6kSLQEMKhcypgdtRJROUxs52d037XP3xDXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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