Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '2d2990d88fd1f9ba8372e1de630f667fe58df39901cd8fa2ba11033f57374841' 
  AND token = 'g914LN4a0KITU6OXkeFnI7RhaJ94x0Fb9BWsrD5DsEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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