SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41a1f0d97dd488bcdc0f2e86f1dd88d958a56ad352f24d5754610278c4a19620' 
  AND token = 'XAqsFYpSGpnxoDFADPiACfX/uZtwXLsKj5ru/zkspkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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