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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83e404f9f11e420e680f37b69438d30f17cad65773c580d7800ad4ca2faaf516' 
  AND token = 'jwXZzuitXj+IUw+iGXlHfyRS22uxTl3T0sK5xDkkg2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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