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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48df86da950f3ae4d232a83c372d775b6b384b6561942bf399aea10b9b3fdacd' 
  AND token = 'gcXaXPPn9iwEx0QJlx76yFOFO2ykDsi7Mjwf4i+zSlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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