Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '394cf9725a365512a4790d64ca9df108c7c1e7ca88ef7387cb98074a4aba62c6' 
  AND token = 'qSINmZ2GqZ99ZzneP/ntTXFIeeZnCfyc1X/49sSgkX8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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