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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1cc4e6963b96f31d608effa325bf8e62eda670e8f446a02ba01ed05a62984409' 
  AND token = 'PUVXyv4JnnCstw4M15sdWUhiwkNYYhkLeSRBuUHGY/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}