Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cf06d7e068e6813f9459578df6d0f36bbf33b237e9ae29fe03472c091af22cee' 
  AND token = '3FEpeNwP1FLElHhyNR12/c82Y/vIxPnoSLa3jW9sJYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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