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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '3964798b5a8752eb73bb2152cf7c6557c715bdad0589f23b180c9615a2a18062' 
  AND token = '9MJsTS8WCBkd8y8Zr5P0AXGVC6uHU30jmxoVYi3uiZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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