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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '5896e83b7c4b4f40c6825e6ee82172bb028975938af6b001aedfbf697a8c587d' 
  AND token = 'fzAnOxv6HC5yH7KJjKR4bw15ELzF1Xoq00sSDdIZAmI=' 
  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"
    }
  }
}