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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '14dca1b8bf6389cfe78d5ee2cd8e9c1bc8f0bf30c5c8fc00ff19333d7a0c9d73' 
  AND token = 'JS/9NU+krroP6GVWG2LS04FYUmmtJYYhzcrft8N4HsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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