Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b971af8795f5146fba1f5e07846a91d2a0b4e2c86602e9bdd9d59163fff3d45' 
  AND token = 'AA6A05/FIulUfUmc8QWzVQIywngQ0E3LffaSj3lkUdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}