Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc3fade52170f5057da34e06298dda35dbca3d5dc052e405e2bf97b7351909d6' 
  AND token = 'UC9I/hRKyZzm/shAgVDDJeHcxT+rMfIOGa+wPCStIAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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