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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9161edb514f54ccd49c7491b78ffc4e466bec5763af110c4137cbd42e810bcf7' 
  AND token = 'EsEIE9KJGfPB+H/zRl1ajlC4EpryxND3J17wIe3ocms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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