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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45c665701ae8f3836b4a9bebdf1debb32ab289b34876aa6ac99810c62682ab1a' 
  AND token = '711Aryl3iwklFIDPVwa2ngkX6UGOE1VJ0ztcDBd4g/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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