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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'eb26a70562859af34d774f7d37c75d7e6685ed8f700feafae7683ad22b9f9853' 
  AND token = 'YaxIk77HiTIoQ/pE3yHD/Wk8ASVGdqKZT5ORP9u+6dE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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