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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '92a3defe6aa2e047a450881b8235a3754b8c6a3fae0803cf5f3c5efa0d4b6dde' 
  AND token = 'WbXvwU31vg3oL08ofYEJwIHBD+EGbYE9CVYwxsC/lGM=' 
  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"
    }
  }
}