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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49c52ec0ed144fda733d0161d688af71e0ba3f75fb6fe5889f4639f40784a060' 
  AND token = 'ondrGzWn9MrXRE54gdw4P2nJxvinCRkVTT8e68l/7Xc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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