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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a8112fbbbdd9961af933149cdb4c239916553e4ddf6da3e30e2eca71e9ce70d8' 
  AND token = 'oJ6NWufCORjofzmlM6bjD0qqwcGrJgj5ZrL7E3sjV8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}