Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9434d5ffda273ce765531a59fbc1d8e92f739df29c9ab8cea72a2def6bcb35' 
  AND token = 'GNjll716hM65SSCLhu8HBIO+uRslGdcN+y7ncBJQU3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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