Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d24ab9f5472ae2ba14b004a464b1dc4e10ffc316989b8bfc38cb4b16c6fb094' 
  AND token = 'qPn15Tgb86YniBRPwXmn/BQWq9lccRSLbcppZDoUYeY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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