Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4bbfd1f24fc8c709fa7c25c55ba80ec11b9a7e3ede0d149e6a9ca10f417c5ee' 
  AND token = '9FU10inLrTvf2Bml/0UW2jkYyo9nTGtZPqtjbMYiR4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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