Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5d4d355c0d7e2470fe8e0474b7dcce25015e16ce67c5d28732a348a72a4f384d' 
  AND token = '3D15qd32GCzAJ0G8ALShM3gBeoKhb+2TprVqHyGIobA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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