Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '085b0a89c6a36fbb9dcb8203841e8b653f1f20d1fa3dc1b81aff509d736095ba' 
  AND token = 'VtAH4iqlA71vEPYEaSASG+grVGbYG6ijsUMIwye6tC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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