Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08dc1111478af1727c52bb251ddd93a3b529d1a74aec6e054cafd7fa5782bd51' 
  AND token = 'HLKdlodP+TSgSw8nW6vmrbKZQstnD9LgMQvYwFWuYio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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