Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc8711f326dae2040c3bb15d8f1cceaf883923abcfc83873845c5e9600bd0cff' 
  AND token = 's5+/3Ueem355XIlz8+pGxoSsjmd3JqgKP/C3LwUqDmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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