Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'affab2f5fda1f1598d5e497f431f8088b04bf7bba7bbcc52b7583a48b3016dac' 
  AND token = 'mUx34NmMDsZojBFpqSC9hLXrbu6BFl8Vs7XdAtHrF2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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