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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e160a259bf46eb96c2ab01ce10f05fc7c527d1a1c4048bceef6fb96a90373aa4' 
  AND token = 'SuJF93uI4dgwdbyIrXAlTcBWrBIvlwcaqE735q/Q2+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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