Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '1ddb1c5b707c392deae0f78b9fc5d4ac13077953a5659bbe84dadb7db1e0a9c1' 
  AND token = 'o5ZDzYi704v4Doc0ggK8KS/mR+lyuMoheR3+j1eW9G4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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