Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '119472ffbfc056b295d5a1ddc528e4224024301c5456f0bb5d7c1aa658d2f2fd' 
  AND token = 'wm/2ZLnz8eRCQbdfNT+P0w2tyG1ijd82NcfEb6mPXBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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