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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8be7e7ec27ca5e335292ad6b7b3636d6e1e4ad548b85d466510e61bc05011a47' 
  AND token = 'HtI9kIWJXO3nAPfBzJop1zuKcStOLGN+BORn7w3jUVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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