Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac30bac44ea3ddac6cfdae16be5912662f284ae198bd82592afb35775958f1f' 
  AND token = 'TutqHW4tPrnHs2Qd4x0s2NljbtubVa3NCiV+f9n2QFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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