Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0b2b07a601ca97f5747cfb2a3120c96f6f4d641b913ceb797376aa5f6abeb4f' 
  AND token = '7bXYvSPQxS1qXfB6mUFas6wMypNx5eOrOw8eGGUx7Yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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