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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd81d4b5df3d53d640f8bb22a7e20082f71cf63acee06554bccd7a6f575974390' 
  AND token = 'ZID7uyk2oTxa7x31qJpfJgYoVTlbtRnifX3mCsZpyAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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