Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '95b3085b0934c976478acab2889fc919dc564cd2f79577405ae8fa7b0324c154' 
  AND token = 'AIUckYRm4miB3nFYUJBTANHRxo5kBqJ+1g0dwxLucK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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