Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4df8925a95a80fb9648e46346b6eb30e3b81fd18adc3ca9e1211c224731f25be' 
  AND token = 'z2o14XShoelV4WInJuGgCy+X1XcT7FbgfKqLUXJ+i3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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