Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2798e677bea9036279d7ddfd963239914e0949458d2fb999bdc8f426b33a511d' 
  AND token = 'uizi05hdUqqxW/LAyRFYsiZzzdxf/zu8K2A/JFEmrrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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