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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '73b00e9ec5ba8dc94e0e180deac8f5fa1a652394276ede2ba023d3f159b9a9e5' 
  AND token = 'IufDtYT2xJxaNOf6b6HgBSy3BMw9+YEIKWYNnF7PSaE=' 
  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"
    }
  }
}