Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b472ebb37ccfe36b03d5fdf1b311d8b4be5b4ce5ac6afa93f8300bd04a09f5' 
  AND token = 'ZukifcBWihumvzz2hc74EvKbXL5c6U4A4z5K/vnbfAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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