SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dc8d37fd893e5b9103fe31272a37ae6fce556fd6647fb4c67163628df40f81b1' 
  AND token = 'yOB0VZh0AzA9IQITR6GSnmFXcakw4KuOeWLZNUomNjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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