Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48ce88926ebd75b7b97388e818bc6c3f1597a8fbbc2d20acd750709280d92a7c' 
  AND token = 'NiMEdnGAJSLsTiG+OHLpSpHCeA/W/PE+Z3w3DpDklC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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