SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '21e41fa4e4f7c6b3a2dfd00537f304a4f2e8bf64d89a91c784aff2b46e22bd88' 
  AND token = 'g58RNKjckUqmjoer3y3JNcYUQKFGC4xDwkFTTFtQHVY=' 
  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"
    }
  }
}