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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '852cbbd70ad70ebd22e322be9b28c7a795ae06c1b351f51f53ca9512b824ddbc' 
  AND token = 'XmeJxF6C3K2T297Sve57RNhwiJLMMxfHwivuqRPsAxM=' 
  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"
    }
  }
}