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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'f901474208ac864386b7c7f55f403643e319160b32ac931d20fca7ab20b72c52' 
  AND token = 'kZVasdSYHE4ec+OgmikEdf5cXAuUag8j9vIxq78kQ8k=' 
  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"
    }
  }
}