SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '465a87618782781c2f36bc9bae438768265250f754f8e9c089d1df8b2e9f6b30' 
  AND token = 'xvjImmqnmpeSiKfROwUJ/rM0tTFsgebKygIZ/SKOVoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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