SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '28370dbd2206490ca7633d924a310165528742eb84c28ef249241b7ca1f375c2' 
  AND token = 'lcM2vHjVR3/2Xvz20kFFOJABDV7ykV/u5uUK8gaCCxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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