Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f16ee750bc6c7a55c9f8a070aea5c7705ddc4ff64ab0738d401aea8d20a709de' 
  AND token = 'qpthDO2Re1lJH4qE+rWXzeLU9ECUbq09c+agtEw5ITk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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