Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '08636e890ffe2ce0e6001824efddd3e52df4559ac9977ea6aec48e7aba808be4' 
  AND token = 'Ec54DGQTwdWEYLCkvRUnuNDukO/nQKm32IkN07UVsMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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