Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb15a64b7907c3ee313298acb96fb3d7384970c7ff2690ee2bb87f58bb392d3' 
  AND token = 'Yk1edwoIVtk7/fEJTWQkBM5dRewxzeFspKiguUchZTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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