Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd998db84d414a8e90c2360e8ae70608d160f7b482fd6990a84dac533c46e35d' 
  AND token = '1o3TRwKnJwJmNTgjMmmh0eBUeEZEG12qpoFue4jJTlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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