Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4f6c7c364b13df69f30c9e39dd92263b5aafa26b20b2c64677ef42fb19b065' 
  AND token = '+64bGpVhwkWu5PxU5SNnEwWAj+qVtSUIskmfxnWEgDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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