Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d0611fd54ab6fefaad4a5aaa41f418d390696dd6b6d26eda372e107e6d4d966' 
  AND token = 'fAL0TuVrEvXrSpUTMnUCE3WNTs+NArKKbIYeyxtKv8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}