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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '600395eca4d8c2313d2c8190b957f88a19f12208eb5f0ec42db72278da0a5481' 
  AND token = 'dF3agO4DAEheNMd+Qt/9HX1dF0QI+uHku7lfX/EfpNY=' 
  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"
    }
  }
}