Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '746b5c5f29d05959f7702e352ff44fbe54d4c1cef9d1f5961d762a7125fe9a2d' 
  AND token = 'KVZPdeR2nvF2txPB2vTjeQeP1pA8DQeVr1dg85cRD6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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