Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d92daf9faf0e7bf355d325b458bc68508b3a9f599cc7a467d41fb5d7d12320b' 
  AND token = 'vd6AClSverFHJkatw8fmqqoSdhgXfcQD6Vr26QTCico=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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