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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd14476d8ef28d782c3d92aaa9df8fd93f6d2718c168580dc15758909bf002edb' 
  AND token = 'NQumifsPqSI8UWxnxZuNLfXJd0gFXCgFW4cx0gqYXa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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