Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d94ba048248e7a95a51cfce3470e580fc10063da3163bba960d443f14f17ae3' 
  AND token = 'TvHHNsDmgljAi1FQVkhspd/88hrcEWAS+uUztLosfEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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