SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0fb2c091a91c2943e3e39e3f3eb5215b197fd11c3296e7810024a275417ab30e' 
  AND token = 'PmmjZuGpUJBY7cRV3m+ZXQeIsf/cyqn2VrfHYZwR/wc=' 
  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"
    }
  }
}