Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '8bbb8d717e193857136e588528a7afd1d899ecbdc36499177278494ff294909a' 
  AND token = 'ALmvOctiT6WvVWvwIlnycPggTm4Ceo+AnHcQ19EXUBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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