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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9083d1787524067e880451bcc87c927a7e25aa5cffd0bfb19561f5f85684294' 
  AND token = 'qy8sVMsZE2dVc/KpL8cIW5zyHNuM0dFXDKrpd/Ui5Bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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