Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9154bbb9d5c2bb145e8a66020fada969ebce727eacb770708e688a54a102b87c' 
  AND token = 'fXqBoNQwTGkk94eWrU9Wp65Wv2ocb22gunXw5G+OhUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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