Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a63ad116f56bce3de3ccb0ca79d0bf35c8ae8a14bb9856da67c0281126bb2c40' 
  AND token = 'eMb9o+ShMoPpk0SLhblbdpNfigrktaF5qIaeGzq3/IY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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