Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c2e7ff42018c68759046117afada2e787f5eba42aa42373a0b8fd8e1020a227' 
  AND token = 'zgzpSZ72YjqzDKVA4fjrJVvZEa35oFIOokn3EessyAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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