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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9969b45ff60b17cffa57a9a9304a3b8c300cf725bb865da5ef85f8b5d333c5ec' 
  AND token = 'CKA4F3pYcjgdNco48QOMXcZ6eFdByOwvpHsRiMB+wi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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