Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcc4b4d82239c06b95261d1acf379da8ca95a6e858b8e616fed6adceceab5de2' 
  AND token = 'uyYacgc6NFLz37hqmkiVdVUedJPcVjZnWeovNkVX5R0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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