Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50b94f2c574ec22f7ceb2363a419c67bbdf213921d16734811c260614bf03863' 
  AND token = '7tfp3+4f3JXLHgavs5fRux1Vgr+SYLCz82DvcJJDTTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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