Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4aa80b92371bda8e4a8e131ae18ca64878eefc2081d54de1a9006bf778d13a0' 
  AND token = '0wKb5EK8xcpk9WWbMCvjajdIjP/mMww/DT/2FC9y3Gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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