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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cf9abc699525c7fa4120218ed8cf772043db4220cf76ec1d771322d30d3db80' 
  AND token = 'PJkg9bXgntmuO+L3g2j9ODzxbrE+SZRky7cmOc3J8NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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