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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e3d48c5c629764d63e930bb1bae18edfcf109fec8bf097060f2f42595e2e9739' 
  AND token = '4ftw0bFeh0gmxRYDA1a+XaGbXLIM45CGr8KdMppX8uw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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