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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c114e34369a2b4a9a730dd1387159090c50e3d6118b305c10d79ec1fc7a1f9c8' 
  AND token = 'fnuhrlp8dNoG8YNqVhrltalTLKJSWgEX7xa2+r8lJzI=' 
  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"
    }
  }
}