Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8318fb9184717d6199cfbafdca623781ce4ebacae518a00d682b0f603c8b1ea4' 
  AND token = 'eNycWAlaFwJLX7M5bTH6whDOV4Bpgqub9hYywvnTMeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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